<?php
    // +----------------------------------------------------------------------
    // | ThinkPHP [ WE CAN DO IT JUST THINK ]
    // +----------------------------------------------------------------------
    // | Copyright (c) 2006~2015 http://thinkphp.cn All rights reserved.
    // +----------------------------------------------------------------------
    // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
    // +----------------------------------------------------------------------
    // | Author: yunwuxin <448901948@qq.com>
    // +----------------------------------------------------------------------
    namespace think\console\command;

    use think\console\Command;
    use think\console\Input;
    use think\console\input\Argument as InputArgument;
    use think\console\input\Option as InputOption;
    use think\console\Output;

    class Help extends Command {
        private $command;

        /**
         * Sets the command.
         * @param Command $command The command to set
         */
        public function setCommand(Command $command) {
            $this->command = $command;
        }

        /**
         * {@inheritdoc}
         */
        protected function configure() {
            $this->ignoreValidationErrors();
            $this->setName('help')->setDefinition([
                                                      new InputArgument('command_name', InputArgument::OPTIONAL, 'The command name', 'help'),
                                                      new InputOption('raw', null, InputOption::VALUE_NONE, 'To output raw command help'),
                                                  ]
            )->setDescription('Displays help for a command')->setHelp(<<<EOF
The <info>%command.name%</info> command displays help for a given command:

  <info>php %command.full_name% list</info>

To display the list of available commands, please use the <info>list</info> command.
EOF
            );
        }

        /**
         * {@inheritdoc}
         */
        protected function execute(Input $input, Output $output) {
            if (null === $this->command) {
                $this->command = $this->getConsole()->find($input->getArgument('command_name'));
            }
            $output->describe($this->command, [
                                                'raw_text' => $input->getOption('raw'),
                                            ]
            );
            $this->command = null;
        }
    }
